<template>
  <div class="swiper-container" ref="imageListSwiper">
    <div class="swiper-wrapper">
      <div class="swiper-slide" v-for="skuImg in skuImageList" :key="skuImg.id">
        <img :src="skuImg.imgUrl" :class="{ active: skuImg.isDefault === '1' }" @click="changeDefault(skuImg.id)">
      </div>
    </div>
    <div class="swiper-button-next"></div>
    <div class="swiper-button-prev"></div>
  </div>
</template>

<script>

import Swiper from 'swiper'
// import "swiper/css/swiper.css";
export default {
  name: "ImageList",
  props: {
    skuImageList: {
      type: Array,
      default() {
        return [];
      }
    }
  },
  methods: {
    changeDefault(skuImgId) {
      //props属性只读不改的
      // this.skuImageList.forEach(element => {
      //   element.isDefault = '0';
      // });
      // skuImg.isDefault = '1';
      //自定义事件：子传父参数
      // console.log(111)
      this.$emit('changeSkuImageDefault', skuImgId)
    }
  },
  watch: {
    skuImageList: {
      immediate: true,//数据初始化后会检测到并执行
      handler() {
        this.$nextTick(
          () => {
            // if (!this.xxx.length) return; //这个是优化
            new Swiper(this.$refs.imageListSwiper, {
              // direction: 'vertical', // 垂直切换选项
              // loop: true, // 循环模式选项

              // 如果需要分页器
              pagination: {
                el: '.swiper-pagination',
              },

              // 如果需要前进后退按钮
              navigation: {
                nextEl: '.swiper-button-next',
                prevEl: '.swiper-button-prev',
              },

              // 如果需要滚动条
              // scrollbar: {
              //   el: '.swiper-scrollbar',
              // },

              //点击按钮每次显示2个
              slidesPerView:2,
              //点击按钮每次切换2个，默认1个
              slidesPerGroup:2
            })
          }
        )
      }
    }
  },
}
</script>

<style lang="less" scoped>
.swiper-container {
  height: 56px;
  width: 412px;
  box-sizing: border-box;
  padding: 0 12px;

  .swiper-slide {
    width: 56px;
    height: 56px;

    img {
      width: 100%;
      height: 100%;
      border: 1px solid #ccc;
      padding: 2px;
      width: 50px;
      height: 50px;
      display: block;

      &.active {
        border: 2px solid #f60;
        padding: 1px;
      }

      // &:hover {
      //   border: 2px solid #f60;
      //   padding: 1px;
      // }
    }
  }

  .swiper-button-next {
    left: auto;
    right: 0;
  }

  .swiper-button-prev {
    left: 0;
    right: auto;
  }

  .swiper-button-next,
  .swiper-button-prev {
    box-sizing: border-box;
    width: 12px;
    height: 56px;
    background: rgb(235, 235, 235);
    border: 1px solid rgb(204, 204, 204);
    top: 0;
    margin-top: 0;

    &::after {
      font-size: 12px;
    }
  }
}
</style>